1402640155381 has 4 divisors (see below), whose sum is σ = 1406877739264. Its totient is φ = 1398402571500.

The previous prime is 1402640155373. The next prime is 1402640155403. The reversal of 1402640155381 is 1835510462041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1402640155381 - 2³ = 1402640155373 is a prime.

It is a super-2 number, since 2×1402640155381² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402640150381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2118791445 + ... + 2118792106.

It is an arithmetic number, because the mean of its divisors is an integer number (351719434816).

Almost surely, 2^{1402640155381} is an apocalyptic number.

It is an amenable number.

1402640155381 is a deficient number, since it is larger than the sum of its proper divisors (4237583883).

1402640155381 is an equidigital number, since it uses as much as digits as its factorization.

1402640155381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4237583882.

The product of its (nonzero) digits is 115200, while the sum is 40.

The spelling of 1402640155381 in words is "one trillion, four hundred two billion, six hundred forty million, one hundred fifty-five thousand, three hundred eighty-one".